Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PLANT PATHOLOGY > Lecture 2a > Flashcards

Lecture 2a Flashcards

1
Q

Study of symptoms and signs that characterize a plant ailment to provide accurate diagnosis

A

Symptomatology

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

2 Types of Symptoms based on location

A
  1. Systemic

2. Localized

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Appears on specific plant part

A

Localized symptoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Manifested by the entire plant although the cause may not be necessarily present over the entire body or individual

A

Systemic symptoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Manifested by the entire plant although the cause may not be necessarily present over the entire body or individual

A

Systemic symptoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Manifestations of disease conditions

A

Symptoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

3 Types of Morphological Symptoms

A
  1. Necrotic
  2. Atrophic or Hypoplastic
  3. Hypertrophic or Hyperplastic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Symptoms resulting from a decrease in cell division; inhibition of growth; decrease the production of substances or underdevelopment of plant organs

A

Atrophic or Hypoplastic Symptoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Symptoms resulting from over-multiplication of cells, overproduction of substances or pigments, and over-development of plant organs

A

Hypertrophic or Hyperplastic Symptoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Visible symptoms resulting from destruction or death of cells or tissues

A

Necrotic Symptoms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

3 Necrotic Symptoms

A
  1. Spot, Blotch, Shot hole, Anthracnose, Blight, Scorch, Yellowing, Wilting
  2. Rot or decay, Canker, Scald, Dieback, Damping-off
  3. Bleeding – slime flux, resinosis, gummosis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

elongated spots on monocot leaves

A

Blotch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Black or purple coalesced spots or lesions on the leaves or fruits

A

Anthracnose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Circular holes on the leaves as a result of removal or dropping out of diseased/infected tissues

A

Shot hole

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

discolored circular or angular lesions on leaves or fruits

A

Spot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Death or browning of foliage due to pathogens

A

Blight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Death or browning of foliage or “burning” of leaf margins due to physical factors.

A

Scorch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Flaccid condition of leaves/ shoots caused by lack of water or loss of turgidity.

A

Wilting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Normally green tissues of the leaves turn yellow due to the destruction of chloroplasts.

A

Yellowing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Give an example of Wilting

A

Fusarium wilt/Panama Disease of Banana and Abaca

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What organ does Fusarium oxysporum f.sp. cubense attack?

A

Pericycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Dead tissue in an advanced stage of

decomposition

A

Rot or decay

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Rot may appear in ____ as well as in ___ parts of a plant.

A

woody organs, fleshy parts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Localized, sharply demarked lesions usually sunken or cracked, on the stem bark.

A

Canker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Give an example of a causal agent of canker

A

Erythricium salmonicolor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Blanching of the epidermal tissues that gradually turn pale brown or darker, usually due to physical factors like intense sunlight.

A

Scald

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Progressive death or browning of shoots, branches and foliage, generally starting at the tip.

A

Die back

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Rapid rotting of seeds before they emerge from the ground (pre-emergence) or the rapid rotting of the base of seedlings so that they fall over or rotting of the shoot (post-emergence).

A

Damping-off

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Continuous oozing of sap from wounds or injuries

A

Bleeding

29
Q

Bleeding accompanied by fermentation, usually with foul odor

A

Slime flux

30
Q

Bleeding of gummy substance

A

Gummosis

31
Q

Bleeding on coniferous trees

A

Resinosis

32
Q

3 Atrophic Symptoms

A
  1. Chlorosis, Albication, Mosaic
  2. Dwarfing, Suppression
  3. Rosetting, Etiolation, Witches’ broom
33
Q

Yellowing of some parts of leaves due to partial suppression of chlorophyll formation in the leaves.

A

Chlorosis

34
Q

Viral diseases of plants characterized by intermingled patches of normal and light green or yellowish color.

A

Mosaic

35
Q

Give an example of Mosaic Disease

A

Papaya ringspot virus

36
Q

Complete suppression of chlorophyll formation in the leaves, resulting in very light yellow or beige color.

A

Albication

37
Q

Below normal size of the plants or some of its organs such as in bonsai plants.

A

Dwarfing

38
Q

Failure of certain organs to develop at points where they normally grow such as fruit or flower abortion.

A

Suppression

39
Q

Crowding of foliage resembling rose petals (rosette) due to shortening of the internodes.

A

Rosetting

40
Q

Excessive spindiness of the plant/shoot elongation and chlorosis due to poor light conditions

A

Etiolation

41
Q

Circular swelling on the leaf, stem or root of plant

A

Gall

42
Q

2 Examples of Gall Disease

A
  1. Gall rust of Falcata

2. Crown gall

43
Q

Causal agent of gall rust

A

Uromycladium falcatarium

44
Q

Causal agent of Crown gall

A

Agrobacterium tumefaciens

45
Q

Uncontrolled overgrowth of plant tissue(s)

A

Tumor

46
Q

New plant tissue growing over a wound or an injury in an attempt to heal it.

A

Callus

47
Q

Swelling or bulging of bark beyond girdling wounds or cankers due to excessive food accumulation from leaves coming down the
phloem and being stopped at the lesion.

A

Sarcody

48
Q

Overproduction of anthocyanin pigment on the leaves, especially in grasses.

A

Anthocyanescence

49
Q

Bending of leaf or shoot due to overgrowth on one side of the affected organ.

A

Curling

50
Q

Downward curling of leaf blade as a result of more rapid cell growth on the upper side of the petiole

A

Epinasty

51
Q

Premature falling of the leaves

A

Abscission or defoliation

52
Q

Local swelling of any plant part, usually
woody root, stem or branch resulting
from meristematic stimulation by the
pathogen.

A

Tumefaction

53
Q

3 Forms of tumefaction

A
  1. Burls
  2. Warts
  3. Knots
54
Q

Develop from twig bud cells that continue to multiply without differentiation

A

Burls

55
Q

Flattening of organs such as flowers, roots and stems.

A

Fasciation

56
Q

Clustering of branches about some common point on the plant.

A

Fasciculation/Brooming

57
Q

Fasciculation arises from the development of ____ buds

A

Adventitious

58
Q

Evidences of pathogen on diseased plant

A

Signs

59
Q

3 Types of Signs

A
  1. Vegetative
  2. Reproductive
  3. Others: bacterial droplets or bleeding
60
Q

4 vegetative signs

A
  1. Hyphae
  2. Mycelium
  3. Rhizomorph
  4. Sclerotial body
61
Q

Group of hyphae forming a cottony visible mass

A

Mycelium

62
Q

Root-like strand of a fungus, used for nutrient absorption

A

Rhizomorph

63
Q

Microscopic filamentous vegetative strands of fungus

A

Hyphae

64
Q

Hardened mass of hyphae, usually resistant to adverse conditions

A

Sclerotial body

65
Q

2 Reproductive Signs

A
  1. Spore

2. Fruiting body

66
Q

Basic reproductive unit of fungus

A

Spore

67
Q

Structure containing asexual or sexual spores

A

Fruiting body

68
Q

Example of fruiting body

A

Ganoderma

69
Q

Example of fungal spores

A

Colletotrichum

PLANT PATHOLOGY (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions